ROI trailing stop
Investors Quick Start course suggests not to give back more than 50% of your profits on any investment. ROI is a measure of that profit. An ROI trailing stop set at 50% would allow investors to automatically follow that rule without having to remember the highest ROI's attained and set the stops manually.
A variable ROI trailing stop would allow investors to tighten their stops when the market looks "toppy" (MTI > 1.6